4jx1 replaced manifold gasket yesterday thinking it would solve my problem. Wrong Fair enough it took the map sensor code out of the trouble codes but I still have an audible air leak around that area. My other two codes are intake throttle position sensor and rail pressure sensor. Not sure where that second one is. Anyway the symptoms are bad idle and stalling, check engine light and audible air leak. funny thing is stick the right foot in it and it all goes away for a bit and the air leak changes tone. 1 min later same thing. Ive checked all hoses I can find and blown out the egr. Any suggestions would be appreciated and I would like to know where to find rail pressure sensor. Cheers
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